From: NeilBrown <neilb@suse.de>
Date: Tue, 31 Mar 2009 03:39:39 +0000 (+1100)
Subject: md: add ->takeover method to support changing the personality managing an array
X-Git-Tag: v2.6.30-rc1~241^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=245f46c2c221ef09c7db892f0e3fc2149be42052;p=pandora-kernel.git

md: add ->takeover method to support changing the personality managing an array

Implement this for RAID6 to be able to 'takeover' a RAID5 array.  The
new RAID6 will use a layout which places Q on the last device, and
that device will be missing.
If there are any available spares, one will immediately have Q
recovered onto it.

Signed-off-by: NeilBrown <neilb@suse.de>
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